USB Serial application
Fork of USBSerial_HelloWorld by
Diff: mbed-dev/targets/TARGET_STM/lp_ticker.c
- Revision:
- 10:41552d038a69
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-dev/targets/TARGET_STM/lp_ticker.c Tue Jan 10 20:42:26 2017 +0000 @@ -0,0 +1,83 @@ +/* mbed Microcontroller Library + ******************************************************************************* + * Copyright (c) 2016, STMicroelectronics + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + ******************************************************************************* + */ +#include "device.h" + +#if DEVICE_LOWPOWERTIMER + +#include "ticker_api.h" +#include "lp_ticker_api.h" +#include "rtc_api.h" +#include "rtc_api_hal.h" + +static uint8_t lp_ticker_inited = 0; + +void lp_ticker_init(void) +{ + if (lp_ticker_inited) return; + lp_ticker_inited = 1; + + rtc_init(); + rtc_set_irq_handler((uint32_t) lp_ticker_irq_handler); +} + +uint32_t lp_ticker_read(void) +{ + uint32_t usecs = 0; + time_t time = 0; + + lp_ticker_init(); + + do { + time = rtc_read(); + usecs = rtc_read_subseconds(); + } while (time != rtc_read()); + + return (time * 1000000) + usecs; +} + +void lp_ticker_set_interrupt(timestamp_t timestamp) +{ + uint32_t delta; + + delta = timestamp - lp_ticker_read(); + rtc_set_wake_up_timer(delta); +} + +void lp_ticker_disable_interrupt(void) +{ + rtc_deactivate_wake_up_timer(); +} + +void lp_ticker_clear_interrupt(void) +{ + +} + +#endif